package exer;

/**
 * @author shkstart
 * @create 2022-08-11-21:23
 */
public class ListNode {
    public int val;


    public ListNode next;
      public ListNode() {}
      public ListNode(int val) { this.val = val; }
      ListNode(int val, ListNode next) { this.val = val; this.next = next; }
}
